Update on "Add new export LLM config"

Differential Revision: [D75263991](https://our.internmc.facebook.com/intern/diff/D75263991)

[ghstack-poisoned]

Author: jackzhxng

examples/models/llama/config/TARGETS

@@ -0,0 +1,9 @@
+# Any targets that should be shared between fbcode and xplat must be defined in
+# targets.bzl. This file can contain fbcode-only targets.
+
+load("@fbsource//xplat/executorch/build:runtime_wrapper.bzl", "runtime")
+load(":targets.bzl", "define_common_targets")
+
+oncall("executorch")
+
+define_common_targets()

examples/models/llama/config/llm_config.py

@@ -218,7 +218,7 @@ class CoreMLConfig:
     enable_state: bool = False
     preserve_sdpa: bool = False
     quantize: Optional[CoreMLQuantize] = None
-    ios: Literal[15, 16, 17, 18] = 15
+    ios: int = 15
     compute_units: CoreMLComputeUnit = CoreMLComputeUnit.CPU_ONLY
 
     def __post_init__(self):

examples/models/llama/config/targets.bzl

@@ -0,0 +1,31 @@
+load("@fbsource//xplat/executorch/build:runtime_wrapper.bzl", "runtime")
+
+def define_common_targets():
+    runtime.python_library(
+        name = "llm_config",
+        srcs = [
+            "llm_config.py",
+        ],
+        _is_external_target = True,
+        base_module = "executorch.examples.models.llama.config",
+        visibility = [
+            "//executorch/...",
+            "@EXECUTORCH_CLIENTS",
+        ],
+    )
+
+    runtime.python_library(
+        name = "llm_config_utils",
+        srcs = [
+            "llm_config_utils.py",
+        ],
+        _is_external_target = True,
+        base_module = "executorch.examples.models.llama.config",
+        visibility = [
+            "//executorch/...",
+            "@EXECUTORCH_CLIENTS",
+        ],
+        deps = [
+            ":llm_config",
+        ],
+    )